National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

CONRAD AG RC (COAM8)

Lat: 48.30453°NLon: 111.92363°WElev: 3706.0ft.

NA

27°F

-3°C

Humidity 77%
Wind Speed NNW 4 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 23 Dec 10:00 PM MST
Extended Forecast for

Shelby MT

Winter Storm Watch December 24, 06:00pm until December 25, 11:00am
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 19. North wind 5 to 9 mph.

    High: 19 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: A chance of snow before 10pm, then freezing rain likely. Mostly cloudy, with a low around 11. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. Little or no snow accumulation expected.

    Low: 11 °F

    Chance Wintry
    Mix then
    Freezing Rain
    Likely

  • Christmas Day

    Christmas Day: A chance of freezing rain before 8am, then a slight chance of snow between 8am and 9am. Partly sunny, with a high near 32. Calm wind becoming south southwest around 5 mph in the morning. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 32 °F

    Chance Wintry
    Mix then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 23. Southwest wind around 6 mph.

    Low: 23 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 41. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 41 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of snow after 11pm. Mostly cloudy, with a low around 0. West southwest wind 11 to 20 mph becoming northwest after midnight. Winds could gust as high as 30 mph. New snow accumulation of less than a half inch possible.

    Low: 0 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow before 11am. Mostly cloudy, with a high near 8. North northwest wind 13 to 18 mph, with gusts as high as 29 mph.

    High: 8 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around -2. North northwest wind 5 to 8 mph becoming south after midnight.

    Low: -2 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 19. North wind 5 to 9 mph.
Tonight
A chance of snow before 10pm, then freezing rain likely. Mostly cloudy, with a low around 11. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. Little or no snow accumulation expected.
Christmas Day
A chance of freezing rain before 8am, then a slight chance of snow between 8am and 9am. Partly sunny, with a high near 32. Calm wind becoming south southwest around 5 mph in the morning. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
Mostly cloudy, with a low around 23. Southwest wind around 6 mph.
Friday
Mostly cloudy, with a high near 41. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Friday Night
A 30 percent chance of snow after 11pm. Mostly cloudy, with a low around 0. West southwest wind 11 to 20 mph becoming northwest after midnight. Winds could gust as high as 30 mph. New snow accumulation of less than a half inch possible.
Saturday
A 20 percent chance of snow before 11am. Mostly cloudy, with a high near 8. North northwest wind 13 to 18 mph, with gusts as high as 29 mph.
Saturday Night
Partly cloudy, with a low around -2. North northwest wind 5 to 8 mph becoming south after midnight.
Sunday
Partly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Partly sunny, with a high near 42.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Shelby MT
 48.5°N 111.87°W (Elev. 3406 ft)
Last Update:
3:38 am MST Dec 24, 2025
Forecast Valid:
6am MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation